Here are a few of my favorite sushi fillings, mix and match them as you like.
Spicy Thai cashews from Trader Joes
Tempura fried tofu
Tempura fried jalapeno peppers
Hot peppers of any sort
Tempura fried veggies
Cucumbers that have been marinated in rice vinegar
Spicy cucumber salad (diced cucumbers mixed with a dressing of yogurt, cayenne, rice vinegar and a smidgen of sugar....I will post a recipe for this later, you can also add diced jalapeno to this)
Cream cheese mixed with wasabi
Cream cheese mixed with Thai sweet chili sauce
Lemon pepper tofu
Lemon pepper asparagus
Marinated tofu (in a mixture of teryaki sauce garlic and cayenne)
Spicy nuts (either cashews or macadamia) Nuts that have been chopped and mixed with salt and chili oil....yum!
Veggies! Of course of any sort, matchstick, marinated, grilled, fried, whatever you like...then mix them with any of the other above ingredients.
Some of my favorite combinations....
Fried tofu, jalapeno, cream cheese
wasabi cream cheese, green onion, avocado
cream cheese, green onion
Marinated tofu, grilled bell peppers